I was wondering why you would feel terrible after drinking water, and the only thing I could think of was maybe your're drinking it too fast (like when you want to get something over with quickly). I get a stomach ache when I do that. Also, uptake in water is likely to start flushing toxins out of your body, this might make you feel terrible at first, but eventually you will crave water in order to feel good!
But there is no such thing as the body not needing water. It is a fact that the body needs water, however much a person may 'feel' they do not need it.
So, I would like to suggest, (this was posted somewhere else but I can't remember where) to have a bottle of water that you make taste good to you, either by squeezing lemon in it or putting crushed berries? or something to make it like a drink and drink it slowly throughout the day.
That's what I do, but I try to drink most of my water intake in the morning because that's when a person is most dehydrated.
Well, hope this is helpful in some way....good luck, oh, and by the way, my sister never drank much water, then started doing so and not only did she lose weight (which was not the reason she started to uptake her amount) but she said she started to see remarkable differences in her skin, shinier, less breakouts etc.